Sweden-Number/dlls/gdiplus/graphicspath.c

442 lines
11 KiB
C

/*
* Copyright (C) 2007 Google (Evan Stade)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include <stdarg.h>
#include <math.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "wingdi.h"
#include "gdiplus.h"
#include "gdiplus_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
/* make sure path has enough space for len more points */
static BOOL lengthen_path(GpPath *path, INT len)
{
/* initial allocation */
if(path->datalen == 0){
path->datalen = len * 2;
path->pathdata.Points = GdipAlloc(path->datalen * sizeof(PointF));
if(!path->pathdata.Points) return FALSE;
path->pathdata.Types = GdipAlloc(path->datalen);
if(!path->pathdata.Types){
GdipFree(path->pathdata.Points);
return FALSE;
}
}
/* reallocation, double size of arrays */
else if(path->datalen - path->pathdata.Count < len){
while(path->datalen - path->pathdata.Count < len)
path->datalen *= 2;
path->pathdata.Points = HeapReAlloc(GetProcessHeap(), 0,
path->pathdata.Points, path->datalen * sizeof(PointF));
if(!path->pathdata.Points) return FALSE;
path->pathdata.Types = HeapReAlloc(GetProcessHeap(), 0,
path->pathdata.Types, path->datalen);
if(!path->pathdata.Types) return FALSE;
}
return TRUE;
}
GpStatus WINGDIPAPI GdipAddPathArc(GpPath *path, REAL x1, REAL y1, REAL x2,
REAL y2, REAL startAngle, REAL sweepAngle)
{
INT count, old_count, i;
if(!path)
return InvalidParameter;
count = arc2polybezier(NULL, x1, y1, x2, y2, startAngle, sweepAngle);
if(count == 0)
return Ok;
if(!lengthen_path(path, count))
return OutOfMemory;
old_count = path->pathdata.Count;
arc2polybezier(&path->pathdata.Points[old_count], x1, y1, x2, y2,
startAngle, sweepAngle);
for(i = 0; i < count; i++){
path->pathdata.Types[old_count + i] = PathPointTypeBezier;
}
path->pathdata.Types[old_count] =
(path->newfigure ? PathPointTypeStart : PathPointTypeLine);
path->newfigure = FALSE;
path->pathdata.Count += count;
return Ok;
}
GpStatus WINGDIPAPI GdipAddPathBeziers(GpPath *path, GDIPCONST GpPointF *points,
INT count)
{
INT i, old_count;
if(!path || !points || ((count - 1) % 3))
return InvalidParameter;
if(!lengthen_path(path, count))
return OutOfMemory;
old_count = path->pathdata.Count;
for(i = 0; i < count; i++){
path->pathdata.Points[old_count + i].X = points[i].X;
path->pathdata.Points[old_count + i].Y = points[i].Y;
path->pathdata.Types[old_count + i] = PathPointTypeBezier;
}
path->pathdata.Types[old_count] =
(path->newfigure ? PathPointTypeStart : PathPointTypeLine);
path->newfigure = FALSE;
path->pathdata.Count += count;
return Ok;
}
GpStatus WINGDIPAPI GdipAddPathEllipse(GpPath *path, REAL x, REAL y, REAL width,
REAL height)
{
INT old_count, numpts;
if(!path)
return InvalidParameter;
if(!lengthen_path(path, MAX_ARC_PTS))
return OutOfMemory;
old_count = path->pathdata.Count;
if((numpts = arc2polybezier(&path->pathdata.Points[old_count], x, y, width,
height, 0.0, 360.0)) != MAX_ARC_PTS){
ERR("expected %d points but got %d\n", MAX_ARC_PTS, numpts);
return GenericError;
}
memset(&path->pathdata.Types[old_count + 1], PathPointTypeBezier,
MAX_ARC_PTS - 1);
/* An ellipse is an instrinsic figure (always its own subpath). */
path->pathdata.Types[old_count] = PathPointTypeStart;
path->pathdata.Types[old_count + MAX_ARC_PTS - 1] |= PathPointTypeCloseSubpath;
path->newfigure = TRUE;
path->pathdata.Count += MAX_ARC_PTS;
return Ok;
}
GpStatus WINGDIPAPI GdipAddPathLine2(GpPath *path, GDIPCONST GpPointF *points,
INT count)
{
INT i, old_count;
if(!path || !points)
return InvalidParameter;
if(!lengthen_path(path, count))
return OutOfMemory;
old_count = path->pathdata.Count;
for(i = 0; i < count; i++){
path->pathdata.Points[old_count + i].X = points[i].X;
path->pathdata.Points[old_count + i].Y = points[i].Y;
path->pathdata.Types[old_count + i] = PathPointTypeLine;
}
if(path->newfigure){
path->pathdata.Types[old_count] = PathPointTypeStart;
path->newfigure = FALSE;
}
path->pathdata.Count += count;
return Ok;
}
GpStatus WINGDIPAPI GdipAddPathPath(GpPath *path, GDIPCONST GpPath* addingPath,
BOOL connect)
{
INT old_count, count;
if(!path || !addingPath)
return InvalidParameter;
old_count = path->pathdata.Count;
count = addingPath->pathdata.Count;
if(!lengthen_path(path, count))
return OutOfMemory;
memcpy(&path->pathdata.Points[old_count], addingPath->pathdata.Points,
count * sizeof(GpPointF));
memcpy(&path->pathdata.Types[old_count], addingPath->pathdata.Types, count);
if(path->newfigure || !connect)
path->pathdata.Types[old_count] = PathPointTypeStart;
else
path->pathdata.Types[old_count] = PathPointTypeLine;
path->newfigure = FALSE;
path->pathdata.Count += count;
return Ok;
}
GpStatus WINGDIPAPI GdipClosePathFigure(GpPath* path)
{
if(!path)
return InvalidParameter;
if(path->pathdata.Count > 0){
path->pathdata.Types[path->pathdata.Count - 1] |= PathPointTypeCloseSubpath;
path->newfigure = TRUE;
}
return Ok;
}
GpStatus WINGDIPAPI GdipClosePathFigures(GpPath* path)
{
INT i;
if(!path)
return InvalidParameter;
for(i = 1; i < path->pathdata.Count; i++){
if(path->pathdata.Types[i] == PathPointTypeStart)
path->pathdata.Types[i-1] |= PathPointTypeCloseSubpath;
}
path->newfigure = TRUE;
return Ok;
}
GpStatus WINGDIPAPI GdipCreatePath(GpFillMode fill, GpPath **path)
{
if(!path)
return InvalidParameter;
*path = GdipAlloc(sizeof(GpPath));
if(!*path) return OutOfMemory;
(*path)->fill = fill;
(*path)->newfigure = TRUE;
return Ok;
}
GpStatus WINGDIPAPI GdipDeletePath(GpPath *path)
{
if(!path)
return InvalidParameter;
GdipFree(path->pathdata.Points);
GdipFree(path->pathdata.Types);
GdipFree(path);
return Ok;
}
GpStatus WINGDIPAPI GdipGetPathFillMode(GpPath *path, GpFillMode *fillmode)
{
if(!path || !fillmode)
return InvalidParameter;
*fillmode = path->fill;
return Ok;
}
GpStatus WINGDIPAPI GdipGetPathPoints(GpPath *path, GpPointF* points, INT count)
{
if(!path)
return InvalidParameter;
if(count < path->pathdata.Count)
return InsufficientBuffer;
memcpy(points, path->pathdata.Points, path->pathdata.Count * sizeof(GpPointF));
return Ok;
}
GpStatus WINGDIPAPI GdipGetPathTypes(GpPath *path, BYTE* types, INT count)
{
if(!path)
return InvalidParameter;
if(count < path->pathdata.Count)
return InsufficientBuffer;
memcpy(types, path->pathdata.Types, path->pathdata.Count);
return Ok;
}
/* Windows expands the bounding box to the maximum possible bounding box
* for a given pen. For example, if a line join can extend past the point
* it's joining by x units, the bounding box is extended by x units in every
* direction (even though this is too conservative for most cases). */
GpStatus WINGDIPAPI GdipGetPathWorldBounds(GpPath* path, GpRectF* bounds,
GDIPCONST GpMatrix *matrix, GDIPCONST GpPen *pen)
{
GpPointF * points, temp_pts[4];
INT count, i;
REAL path_width = 1.0, width, height, temp, low_x, low_y, high_x, high_y;
/* Matrix and pen can be null. */
if(!path || !bounds)
return InvalidParameter;
/* If path is empty just return. */
count = path->pathdata.Count;
if(count == 0){
bounds->X = bounds->Y = bounds->Width = bounds->Height = 0.0;
return Ok;
}
points = path->pathdata.Points;
low_x = high_x = points[0].X;
low_y = high_y = points[0].Y;
for(i = 1; i < count; i++){
low_x = min(low_x, points[i].X);
low_y = min(low_y, points[i].Y);
high_x = max(high_x, points[i].X);
high_y = max(high_y, points[i].Y);
}
width = high_x - low_x;
height = high_y - low_y;
/* This looks unusual but it's the only way I can imitate windows. */
if(matrix){
temp_pts[0].X = low_x;
temp_pts[0].Y = low_y;
temp_pts[1].X = low_x;
temp_pts[1].Y = high_y;
temp_pts[2].X = high_x;
temp_pts[2].Y = high_y;
temp_pts[3].X = high_x;
temp_pts[3].Y = low_y;
GdipTransformMatrixPoints((GpMatrix*)matrix, temp_pts, 4);
low_x = temp_pts[0].X;
low_y = temp_pts[0].Y;
for(i = 1; i < 4; i++){
low_x = min(low_x, temp_pts[i].X);
low_y = min(low_y, temp_pts[i].Y);
}
temp = width;
width = height * fabs(matrix->matrix[2]) + width * fabs(matrix->matrix[0]);
height = height * fabs(matrix->matrix[3]) + temp * fabs(matrix->matrix[1]);
}
if(pen){
path_width = pen->width / 2.0;
if(count > 2)
path_width = max(path_width, pen->width * pen->miterlimit / 2.0);
/* FIXME: this should probably also check for the startcap */
if(pen->endcap & LineCapNoAnchor)
path_width = max(path_width, pen->width * 2.2);
low_x -= path_width;
low_y -= path_width;
width += 2.0 * path_width;
height += 2.0 * path_width;
}
bounds->X = low_x;
bounds->Y = low_y;
bounds->Width = width;
bounds->Height = height;
return Ok;
}
GpStatus WINGDIPAPI GdipGetPointCount(GpPath *path, INT *count)
{
if(!path)
return InvalidParameter;
*count = path->pathdata.Count;
return Ok;
}
GpStatus WINGDIPAPI GdipStartPathFigure(GpPath *path)
{
if(!path)
return InvalidParameter;
path->newfigure = TRUE;
return Ok;
}
GpStatus WINGDIPAPI GdipResetPath(GpPath *path)
{
if(!path)
return InvalidParameter;
path->pathdata.Count = 0;
path->newfigure = TRUE;
path->fill = FillModeAlternate;
return Ok;
}
GpStatus WINGDIPAPI GdipSetPathFillMode(GpPath *path, GpFillMode fill)
{
if(!path)
return InvalidParameter;
path->fill = fill;
return Ok;
}
GpStatus WINGDIPAPI GdipTransformPath(GpPath *path, GpMatrix *matrix)
{
if(!path)
return InvalidParameter;
if(path->pathdata.Count == 0)
return Ok;
return GdipTransformMatrixPoints(matrix, (GpPointF*) path->pathdata.Points,
path->pathdata.Count);
}